&compile_time_const_nodes,
                                            lib_runtime, IsIntraClusterEdge));

  std::vector<Node*> rpo;
  GetReversePostOrder(*graph, &rpo, /*stable_comparator=*/NodeComparatorName(),
                      /*edge_filter=*/NotBackedge);
  for (Node* n : rpo) {
    if (!compile_time_const_nodes[n->id()]) {
      continue;
    }

  std::vector<bool> const_args(arg_types.size());
  // If we can't analyze the const args. Bail out.
  TF_RETURN_IF_ERROR(
      BackwardsConstAnalysis(*((*fbody)->graph), &const_args,
                             /*compile_time_const_nodes=*/nullptr, flr));

  for (size_t i = 0; i < const_args.size(); ++i) {
    if (const_args[i]) {
      constant_arg_indices->push_back(i);
    }
  }

  FunctionLibraryRuntime* lib_runtime =
      pflr->GetFLR(ProcessFunctionLibraryRuntime::kDefaultFLRDevice);
  std::vector<bool> compile_time_const_nodes(graph_->num_node_ids(), false);
  TF_RETURN_IF_ERROR(BackwardsConstAnalysis(
      *graph_, /*compile_time_const_arg_indices=*/nullptr,
      &compile_time_const_nodes, lib_runtime));
  // Iterate over nodes in sorted order so that compiler fuel is deterministic.

        std::vector<bool> const_args(num_args);
        TF_RETURN_IF_ERROR(
            BackwardsConstAnalysis(**subgraph, &const_args,
                                   /*compile_time_const_nodes=*/nullptr, flr));

        DataTypeVector arg_types(num_args);
        TF_RETURN_IF_ERROR(GetArgTypes(**subgraph, &arg_types));

        // Compute a permutation of the arguments such that the constant